Improvement in stove-pipe dampees



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TO ALL WHOM IT MAY CONOERN:

Be it known that I, HARRISON OGBORN, of Richmond, in the county of Wayne, and State' of Indiana, have invented a new and useful Improvement in Stove-Pipe Dampers; and I do hereby declare the following to be a full and correct description of the same, sufficient to enable others. skilled in the art to which my invention appertains to understand and use the same, reference being had' to the accompanying drawings, making part of this specification, in Which- Figure 1 is a perspective view of my improved damper.

Figures 2 and 3 are longitudinal vertical 'sections in the line a: a, 1, showing two different positions of the same; and

Figure 4 is a transverse vertical section of the same, inthe line y y, fig. 2.

Similar letters indicate corresponding parts in the several figures.

The nature of my invention consists in placing between two of the plates of a revolving three-plate stovepipe damper a fourth sliding plate, in such a manner that the damper may either fully close the draught, leaving only suiiicient space around its edges to allow the products oi` the combustion and gases to pass without creating a draught, or dampen the draught sufficiently to prevent a too rapid consumption of tho fuel, and consequent waste of heat, or that, on starting a fire, a fuel-draught may be opened.

A, in the drawings, represents the stove-pipe, and B, B1, B2the three plates of the damper, attached to the two cross-pieces or plates C C. The centre plate B is of a larger diameter than the two other plates B and B2, and is provided with an opening, as shown at b, figs. I, 2, and 3. The two bearings D'D ot' the damper are made in two pieces d d', provided at their ends with V-shaped recesses and projections, as shownat a, tig. 1, to keep them firmly connected. At the point where they pass` through the stove-pipe, they are provided with grooves c, which are grasped by corresponding cxsections in the two pieces of stove-pipe at a joint, so that the bearings cannot move laterally, but are free to rotate when operated by the handle E, the grooves e being sufiiciently sharp to enable the weight ofthe stove-pipe to prevent its turning otherwise. The cross-plates C C are attachcdto the inner ends of the bearings D D', and the centre plate Bl is attached to the pieces d. The parts d1 of the bearings are provided with slots d2, corresponding with slots c in the pieces C', and which are the bearings for the squarev end pieccsfof the circular sliding plate F, whichcovers the opening b, in the centre plate Bl. These end piecesf are made thick, and with rounded edges, so as to freely slide in the slots e", in tlie pieces C', andl slots d, parts d, of the bearings D D. The plates B and B2 are made of a conical form, so as to deiiect the ascending heat from the centre, and radiate it on to the stove-pipe, thereby making the vlatter'act as u. radiator ordrum. I

When starting a tire, a strong draught is required to kindle the fuel. For this purpose the damper is tu'rnod, so that all the platesvare in a vertical position, opposing no hindrance to the draught. As soon as the fire is well under way, the damper is turned into a position as shown in iig. 2. The heat and products of the l combustion pass around the plate B2, through plate Bl, around the plate B, and out into the chimney, the plate F gliding down in the slots Z2 of parts all, and the slots c', in plates C', until it rests on the plate B2.

In the evening, to keep the fire in over night, or whenever it is desirable, the damper is turned into the position shownin fig. 3. The plate F has now slid in its bearings on to they-plate B1, covering the hole b of the same up entirely. The draught being shut oli', by this means the gases and other products of combustion lare now obliged to pass oli' around the-edges of the plate Bl, its hole b bcingiclosed by theplate F.

Having thus described my invention, what I claim as new therein, and desire to secure by Letters Patent, is-

1. The plate F, provided with end pieccsf, sliding in thc slots c and di, substantially as described.

2. The slots c', in the cross-plates C, substantially as'and for the purposes described.

3. The slots d2, in the parts (Z1 of the bearings D D', substantially as and for the purposes described.

4. The combination of the plate F, provided with end pieces f, the cross-plates C', provided-with slots e and bearings D D', the parts of which have slots (Z2, substantially as and for the purposes described.

5. The combination of the conc-shaped plates D and B2, circular plate B1, provided with an opening,` b, sliding-plate F, with end piccesf, cross-plates c c', the latter provided with slots c and bearings D D', with grooves c, and consisting of parts fZ d, the latter having slots d2, substantially as and for the purposes described.

The above specification of my improvement in stovc-pipe dampers, signed this 28th day of February, 1867.

HARRISON OGBORN.

Witnesses:

EDM. F. BROWN, GEO. W. Woon. 

